| 摘要 |
A fluid filtering device is provided for connection with a fluid line. The fluid device includes a housing having a fluid inlet on one end, a fluid outlet on the other end and a fluid passage formed through the housing. The fluid passage connects the inlet with the outlet and includes a port formed along its length. A tubular filter element open at one end is removably insertable into a filter chamber formed within the housing and, upon insertion, is axially slidable between a first position in which the open end of the filter element abuts against the fluid port and a second position in which the open end of the filter element is spaced from the fluid port. A spring urges the filter element toward its first position. In operation the fluid flow into the housing inlet passes through the port and into the interior of the filter element. The fluid then flows through the filter element and to the housing outlet. When the filter element becomes clogged, the resulting increase in differential pressure across the filter element forces the filter element to or towards its second or retracted position which enables direct fluid flow from the inlet and to the outlet while bypassing the filter element. In addition, a filter member is secured across the other axial end of the filter element to permit fluid flow axially through the interior of the filter element, through the filter member and to the fluid outlet. When the filtering device is used as a suction line filter, a bleed is provided through the housing and open to the outlet side of the filter member to prevent air accumulation.
|
